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LIEKKI™ APPLICATION DESIGNER V4.0
LIEKKI™ application designer (LAD) is a versatile design tool for fiber applications providing a strong platform for simulating and optimizing fiber amplifiers, amplified spontaneous emission (ASE) sources, and fiber laser systems.
This software is based on precise algorithms that account for all the reflections in the system – especially crucial for accurate laser and ASE light source simulations. The simulation engine also accurately accounts for large mode area and highly doped fibers.
Optimized algorithms and careful design allows to build LAD on a Microsoft Windows platform without the need of powerful multiprocessor workstations. This approach ensures large accessibility and reduces costs for the end users.
Download a demo version of our current LIEKKI™ application designer.
For academic users we offer a special product package. Please contact us for more information.

| New LAD v4.0 features | - Multimode analysis of bend fibers
LAD v4.0 allows seeing propagation effects of higher order modes in bent fibers. This enables the evaluation of optimum bending radius for certain higher order mode discrimination. - Variable step size in transient analysis
LAD v4.0 allows simulating low repetition pulsed lasers by setting a short time step to describe the pulse and long time step for the period between pulses. - Design wizards
LAD v4.0 creates designs and runs simulations through a window based step-by-step approach. This allows checking quickly the most common designs by answering a few questions. As a start LAD v4.0 provides wizards for EDFA, YDFA, YDFL and ASE sources. More wizards will be added in the future. - Optimization tools
LAD v4.0 allows optimizing design parameters for specified targets, for example to obtain the optimum fiber length for higher gain. - Concentration conversion table
LAD v4.0 calculates active ions concentration in various formats. - Mode field and cutoff calculation
LAD v4.0 calculates mode field profile, effective index, cutoff and bending losses for guided modes. - LIEKKI™ EasySplice integration
LAD v4.0 launches LIEKKI™ EasySplice, an Excel based application that provides splicing settings for LIEKKI™ fibers. |
LIEKKI™ application designer (LAD) addresses all development and product phases for fiber lasers and amplifiers: Research, design, engineering and manufacturing, application end user and education. | LAD in research |  | LAD provides researchers with the tools to investigate properties and behaviors, which are impossible, too time consuming or expensive to investigate in the laboratory. For instance: The effects after adjusting the core composition or the mode field shape for high-order propagation modes. By viewing the mode field inside the fiber, one can investigate the overlap between the optical beam and the dopant distribution. | | | | | LAD as a design tool |  | The design cycle of an active fiber can be greatly reduced by using LAD. New refractive index profiles, rare earth doping profiles or dimensions can be easily set and tested. By setting the doping profile, one can optimize the fiber gain. | | | | | LAD in engineering |  | LAD provides the possibility to build and test a fiber amplifier or fiber laser within minutes. A fine tuning of the component parameters can be done automatically by using the built-in iterations capability. LAD calculates the optical power for signal pumps and ASE sources for each component. | | | | | LAD in manufacturing |  | Monte Carlo analysis and automatic iterations are key functions to support the manufacturing process for fiber laser and fiber amplifier applications. Monte Carlo analysis evaluates how the performance is affected by the component’s tolerance. | | | | | LAD for end user |  | LAD can be used by the application’s end user to forecast the behavior in various regimes, including the transients, multimode propagation, macro-bending. Mode field deformation due to fiber macro-bending is important for output fiber coupling. | | | | | LAD in education |  | Having a friendly user interface with a fast learning curve, LAD is the ideal tool for active fiber courses as a simulated laboratory. All components have a comprehensive properties window that allows the user to customize the values. |
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| Available components | Active components - Erbium doped fiber
- Double cladding erbium doped fiber
- Ytterbium doped fiber
- Double cladding ytterbium doped fiber
Passive components - Coupler
- WDM
- Isolator
- Filter
- Mirror
- Fiber grating
- Attenuator
- Passive single mode fibers
- Passive double cladding fibers
Sources Fiber Junctions - Ideal connection
- Splice
- Connector
| | Functionality | - Models for all LIEKKI™ fibers
- Continuous wave (CW) simulation
- Variable time step transient simulation
- SBS and SRS threshold calculation
- Inversion level calculation
- Iterations - Automated multiple simulations
- Monte Carlo analysis
- Optimization tool
- Multimode propagation both for straight and bent fibers
- Design wizards
- Concentration conversion tool
- LIEKKI™ EasySplice integration
- 2D and 3D graphics
| | User-friendly graphic interface | - Graphical tools for layout design
- Various reporting tools
- Probe tool
- Customizable graphics
- Numerical data
- Export functions (ASCII, bitmap)
| | Software environment | - Operating system: Windows Vista/XP/2000/NT/98
- User Interface: GUI
- Language: English
| | Recommended PC configuration | - Processor: Pentium 1GHz or faster
- 256MB of RAM or higher
- 100MB free hard disk space
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